The Supreme Court ruling stated that it would be wrong to refuse to bake a cake for someone on the grounds of sexual orientation, gender, religious belief or any of the parameters laid out in the Equalities Act 2010. However, the ruling stated that it is legal to refuse to place a message on that item which would be against the beliefs of the person requested to place that message on the item.
However, If we then take the above ruling and place it in a purely hypothetical situation in a workplace. Let us say you have a person of Palestinian nationality who was told to drive a forklift which bore the logo of an Israeli manufacturer. That person may then refuse to operate that forklift on the grounds that it is against his/her belief to use anything that supports the maintenance of the Israeli state.
Should the employer then decide to carry out disciplinary action against the employee, that employer would now immediately come up against the above Supreme Court judgement.
As stated, the above is a purely hypothetical situation, but I believe it does bring forward many similar scenarios that could develop in the workplace and in other sectors of life.